固体氧化物燃料电池用(La,Sr)(Co,Fe)O3-(Ce,Gd)(Sr)O2静电纺纳米纤维复合阴极

2015 International Conference on Advanced Mechatronics, Intelligent Manufacture, and Industrial Automation (ICAMIMIA) Pub Date : 2015-10-01 DOI:10.1109/ICAMIMIA.2015.7508030

I. D. Wijayanti, C. Chou

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引用次数: 0

摘要

研究了在GDCSr电解质上丝网印刷的电纺纳米纤维复合阴极La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)- ce0.78 gd0.2 sr0.020 o2 -δ (GDCSr)在中温SOFC中的应用。阻抗光谱测量在500-800°C的环境空气中进行。增加20wt。% GDCSr纳米纤维对LSCF的孔隙率提高了40%，提供了大量的三相界面，从而提高了电化学性能。纳米纤维复合阴极的交换电流密度增大，阴极极化电阻减小。纳米纤维GDCSr作为孔隙率调节剂和氧离子在复合阴极结构内部扩散的离子通道具有重要的作用。

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(La,Sr)(Co,Fe)O3-(Ce,Gd)(Sr)O2 electrospun nanofiber composite cathode for solid oxide fuel cells

La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF)-Ce_0.78Gd_0.2Sr_0.02O_2-δ (GDCSr) electrospun nanofibers composite cathode which was screen printed on GDCSr electrolytes were studied for application in intermediate temperature SOFC. Impedance spectroscopy measurements were performed in ambient air over a temperature range from 500-800°C. The addition of 20wt.% GDCSr nanofiber to LSCF resulted in an increasing of 40% porosity value which enhance the electrochemical properties by providing much amount of triple phase boundaries. The nanofiber composite cathode exhibits an increasing exchange current density and a decreasing cathode polarization resistance. Nanofiber GDCSr plays an important role as a porosity controller and an ionic pathway for oxygen ion diffusion inside the composite cathode structure.

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2015 International Conference on Advanced Mechatronics, Intelligent Manufacture, and Industrial Automation (ICAMIMIA)

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